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It might be worth using a commercial pcb service. I haven't ever had to etch my own pcb, because it's pretty damn cheap to have someone else do it. I just prototype in the bread board and get a pcb if I want multiples. I'm gonna go build your circuit tomorrow. I'm looking forward to some...

ahh. I'm building your exact set up with a 12f683

My vape is powered by an 18f pic so lcd is easy. A 16f can do it also, but you need the beefy ones, as sprintl the method for turning numbers + letters into chars for the lcd is quite memory intensive. Jump around the wait loop? huh? Can I just press button 2 for 2 seconds when the vape powers up?

I got too busy to test, but I will try and do it by wednesday or thursday. The hex is useful, because I just took that and flashed it to the pic. The hex is what the pic uses, so unless you're interested in how the code works that's all you need. I think I can figure out everything else from...

Thanks for the hex. I successfully programmed the pic and will build and test your model tomorrow. I'm on -8GMT, but I think I got the situation under control.

Could you try sending the hex file? I tried to compile your code files but I'm getting a ton of symbol not previously defined and must be declared in an appropriate section errors.

I was thinking you could post a .zip file to rapidshare or something. Or, I'll just write an email to you and you can reply back with an attachment.

Could you post a hex file for download?? I don't have an assembly compiler installed. I have a few 12f683's laying around from another project. I'd love to run your algorithm against mine.

Do you think you can explain more in depth about your temperature control algorithm? I have been trying to use vanilla PID control, but getting the gains tuned has not worked out well at all. My temperature is drifting by almost 10C!

For insulating the thermocouple you might also try mineral oil? IDK if it will stand the temps, but it is conductive thermally, but not electrically. How do you get such a nice clean cut on your glassware? Also, do you find that resistors on your max6675 lines help? I don't use any and it...

Did you take off the pictures? I was trying to look at your circuit diagram and it appears to no longer be there.

My code has been done for several weeks. I coded it up in C so it was a breeze. I don't have a watch dog timer. I guess I could add one, but I haven't done it yet. My vape doesn't really overheat. If thermocouple connection breaks it turns off.

LCD ain't that bad. Mine only takes 4 or 6 pins, I don't remember right now. I'm using an 18series pic anyway, so I have a ridiculous number of pins. Once I finalize stuff I'll put it on a smaller pic. Also, what gauge nichrome are you using? I have been using 16awg, but I will switch to...

I broke all my glass bits... but i do have 2 working bowl pieces left. For my insulation I cut up an emergency blanket. It looks like mylar or something, but the packaging says it reflects 90% of heat. The vape is coming along, I successfully tested it a few days ago. Right now I have knob...

Hey Norb, I finally figured out where you went after PG went down. What are you using for insulation?